Match and extract if found

[Calli]

This makes the code shorter:

from ipaddress import IPv4Address, ip_address


def make_ipv4_set(file_like):
    results = set()

    for line in map(str.strip, file_like):
        try:
            addr = ip_address(line)
        except ValueError:
            continue

        if isinstance(addr, IPv4Address):
            results.add(addr)

    return results


with (
    open("ip1_file.txt") as ip1_file,
    open("ip2_file.txt") as ip2_file,
):
    ip1_set = make_ipv4_set(ip1_file)
    ip2_set = make_ipv4_set(ip2_file)


# sorting works because IPv4Address is sortable
results = sorted(ip1_set - ip2_set)
# results is now a list. sorted returns always a list

# iterate over the elements and print them
for ip in results:
    # converting IPv4Address to str
    print(str(ip))

I entered this IP44.44.44.44.11 on ip2_file.txt and when I ran the program it doesn't print out this IP address could it be because we are treading the IP as IPv4? can we just assign all the IP as text or number and than compare and extract which isn't in the first file ip1_file.txt